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From ramkrishna vasudevan <ramkrishna.s.vasude...@gmail.com>
Subject Re: [ANNOUNCE] Apache HBase 0.96.0 is now available for download
Date Tue, 22 Oct 2013 04:11:37 GMT
Nice job and congrats to everyone !!!


On Mon, Oct 21, 2013 at 9:38 PM, Elliott Clark <eclark@apache.org> wrote:

> Nice job everyone.
>
> On Sat, Oct 19, 2013 at 1:31 PM, Dave Wang <dsw@cloudera.com> wrote:
> > Congratulations everyone!
> >
> > - Dave
> >
> > On Saturday, October 19, 2013, Stack wrote:
> >
> >> hbase-0.96.0 is now available for download [0].
> >>
> >> Apache HBase is a scalable, distributed data store that runs atop Apache
> >> Hadoop.
> >>
> >> The hbase-0.96.0 release has been more than a year in the making and
> >> supplants our long-running 0.94.x series of releases.  We encourage
> users
> >> upgrade.
> >>
> >> More than 2k issues [1][2][3][4] are attributed to this version
> (counting
> >> fixes done against this and the preview 0.95.x developer series of
> >> releases). [7] is the total list of 0.96.0 changes.  1500+ of these
> changes
> >> are in 0.96.0 alone; i.e. they have not been backported.  At the end of
> >> this note is a sampling of some notable fixes.
> >>
> >> High-level, the big themes driving this release have been improved
> >> stability, operability, scaling fixes, and making it so we are in a
> >> situation where we are free to evolve going forward while all the time
> >> maintaining forward and backward compatibility. A bunch of work has been
> >> done to improve Mean Time To Recovery on server and node crash.
> Everywhere
> >> HBase persists has been moved to protobufs [8] including what we write
> >> across the wire RPC'ing. We have a new balancer, call tracing,
> namespaces,
> >> revamped metrics, hardened replication and assignment, client-side types
> >> and mountains more of new utility and improvements.
> >>
> >> hbase-0.96.0 comes in two flavors; a build that includes and runs on
> >> hadoop-1.x
> >> and another for hadoop-2.x. You must chose the hbase that suits your
> >> hadoopcontext. You will need to restart your cluster on deploy. On
> >> restart,
> >> HBase will run a few migration tasks that will complete in seconds, and
> off
> >> you go again. hbase-0.94.x clients will not be able to talk to a 0.96.x
> >> cluster. See '3. Upgrading' [5] section in the reference guide for
> notes on
> >> upgrading and section '3.2. Upgrading from 0.94.x to 0.96.x' [6] in
> >> particular. Downstream projects should notice very minor -- if any --
> >> changes in API.
> >>
> >> Thanks to legion who contributed to this release.
> >>
> >> At your service,
> >> The HBase dev team
> >>
> >> This release is dedicated to Shaneal Manek, HBase contributor.
> >>
> >> 0. http://www.apache.org/dyn/closer.cgi/hbase/
> >> 1. 0.96.0 http://goo.gl/yp74gU
> >> 2. 0.95.2 340 issues http://goo.gl/4djjE9
> >> 3. 0.95.1 265 issues http://goo.gl/TcdckW
> >> 4. 0.95.0 1263 issues http://goo.gl/Iqcx2i
> >> 5. http://hbase.apache.org/book.html#upgrading
> >> 6. http://hbase.apache.org/book.html#upgrade0.96
> >> 7. http://goo.gl/NKoDqp
> >> 8. https://code.google.com/p/protobuf/
> >>
> >>
> >> SAMPLE FROM RELEASE NOTES
> >>
> >> HBASE-7331 HBASE-6096 Add access control for region open and close, row
> >> locking, and stopping the regionserver
> >> HBASE-7678 HBASE-7667 make storefile management pluggable, together with
> >> compaction
> >> HBASE-8015 Support for Namespaces
> >> HBASE-5335 Dynamic Schema Configurations
> >> HBASE-5939 Add an autorestart option in the start scripts
> >> HBASE-2214 Do HBASE-1996 -- setting size to return in scan rather than
> >> count of rows -- properly
> >> HBASE-9505 Enable replication by default
> >> HBASE-8766 HBASE-6814 [WINDOWS] bin/hbase.cmd zkcli is broken
> >> HBASE-4657 Improve the efficiency of our MR jobs with a few
> configurations
> >> HBASE-6659 Port HBASE-6508 Filter out edits at log split time
> >> HBASE-6055 Offline Snapshots in HBase 0.96
> >> HBASE-7567 [replication] Create an interface for replication peers
> >> HBASE-5305 Improve cross-version compatibility & upgradeability
> >> HBASE-9152 Not able to find HMaster and HRegionServer processes with
> grep
> >> by process name on ps result because of large classpath as argument.
> >> HBASE-8778 Region assigments scan table directory making them slow for
> huge
> >> tables
> >> HBASE-7721 Atomic multi-row mutations in META
> >> HBASE-7007 [MTTR] Study assigns to see if we can make them faster still
> >> HBASE-7845 optimize hfile index key
> >> HBASE-7533 HBASE-7898 Write an RPC Specification for 0.96
> >> HBASE-6553 Remove Avro Gateway
> >> HBASE-8505 References to split daughters should not be deleted
> separately
> >> from parent META entry
> >> HBASE-50   Snapshot of table
> >> HBASE-8214 Remove proxy and engine, rely directly on pb generated
> Service
> >> HBASE-5844 Delete the region servers znode after a regions server crash
> >> HBASE-7315 HBASE-7263 Remove support for client-side RowLocks
> >> HBASE-6135 Style the Web UI to use Twitter's Bootstrap.
> >> HBASE-4676 Prefix Compression - Trie data block encoding
> >> HBASE-6295 Possible performance improvement in client batch operations:
> >> presplit and send in background
> >> HBASE-4403 Adopt interface stability/audience classifications from
> Hadoop
> >> HBASE-7008 Set scanner caching to a better default, disable Nagles
> >> HBASE-7942 HBASE-4755 Make use of the plumbing in HBASE-7932 to provide
> >> location hints when region files are created
> >> HBASE-7835 HBASE-7006 Implementation of the log splitting without
> creating
> >> intermediate files
> >> HBASE-8334 Enable essential column family support by default
> >> HBASE-6849 Make StochasticLoadBalancer the default
> >> HBASE-6066 HBASE-6922 some low hanging read path improvement ideas
> >> HBASE-5074 support checksums in HBase block cache
> >> HBASE-7351 Periodic health check chore
> >> HBASE-5887 Make TestAcidGuarantees usable for system testing.
> >> HBASE-6783 Make read short circuit the default
> >> HBASE-9529 HBASE-9495 Audit of hbase-client @InterfaceAudience.Public
> apis
> >> HBASE-6435 Reading WAL files after a recovery leads to time lost in
> >> HDFStimeouts when using dead
> >> datanodes
> >> HBASE-6206 HBASE-6182 Large tests fail with jdk1.7
> >> HBASE-9208 ReplicationLogCleaner slow at large scale
> >> HBASE-5533 Add more metrics to HBase
> >> HBASE-7306 HBASE-781 [shell] Count shell command to return ruby
> >> bindablevalue.
> >> HBASE-7110 refactor the compaction selection and config code similarly
> to
> >> 0.89-fb changes
> >> HBASE-7603 HBASE-7519 refactor storefile management in HStore in order
> to
> >> support things like LevelDB-style compactions
> >> HBASE-8693 HBASE-8089 DataType: provide extensible type API
> >> HBASE-7932 HBASE-4755 Do the necessary plumbing for the region
> locations in
> >> META table and send the info to the RegionServers
> >> HBASE-6241 HBASE-6201 HBaseCluster interface for interacting with the
> >> cluster from system tests
> >> HBASE-8219 Align Offline Merge with Online Merge
> >> HBASE-9523 HBASE-9495 Audit of hbase-common @InterfaceAudience.Public
> apis.
> >> HBASE-8813 Fix time b/w recoverLease invocations from HBASE 8449
> >> HBASE-7290 Online snapshots
> >> HBASE-8450 Update hbase-default.xml and general recommendations to
> better
> >> suit current hw, h2, experience, etc.
> >> HBASE-8201 HBASE-8089 OrderedBytes: an ordered encoding strategy
> >> HBASE-8877 Reentrant row locks
> >> HBASE-4393 Implement a canary monitoring program
> >> HBASE-4050 Update HBase metrics framework to metrics2 framework
> >> HBASE-4391 Add ability to start RS as root and call mlockall
> >> HBASE-5924 In the client code, don't wait for all the requests to be
> >> executed before resubmitting a request in error.
> >> HBASE-7305 ZK based Read/Write locks for table operations
> >> HBASE-5705 HBASE-5305 Introduce Protocol Buffer RPC engine
> >> HBASE-5838 Add an LZ4 compression option to HFile
> >> HBASE-7404 Bucket Cache:A solution about CMS,Heap Fragment and Big
> Cache on
> >> HBASE
> >> HBASE-7590 Add a costless notifications mechanism from master to
> >> regionservers & clients
> >> HBASE-9203 Secondary index support through coprocessors
> >> HBASE-9121 Update HTrace to 2.00 and add new example usage.
> >>
>

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